using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityStandardAssets.ImageEffects;
using TMPro;

public class DayNightCycle : MonoBehaviour {

    public Light sun;
    public float secondsInFullDay = 120f;

    //[Range(0, 1)]
    public float currentTimeOfDay = 0.16f;

    [HideInInspector]
    public float timeMultiplier = 1f;

    public TextMeshProUGUI dayText;
    public int day;

    float sunInitialIntensity = 0.8f;

    public SunShafts sunShaft;
    float sunShaftIntensity;


    void Start()
    {
        day = 1;
        dayText.text = "DAY: " + day;

        sunInitialIntensity = sun.intensity;

        sunShaftIntensity = sunShaft.sunShaftIntensity;
    }

    void Update()
    {
        UpdateSun();

        currentTimeOfDay += (Time.deltaTime / secondsInFullDay) * timeMultiplier;

        if (currentTimeOfDay >= 1)
        {
            currentTimeOfDay = 0;
        }

        if(currentTimeOfDay >= 0.40f && currentTimeOfDay <= 0.401f)
        {
            day += 1;
            dayText.text = "DAY: " + day;
        }
    }

    void UpdateSun()
    {
        sun.transform.localRotation = Quaternion.Euler((currentTimeOfDay * 360f) - 35, 170, 0);

        float sunIntensityMultiplier = 1;

        float shaftIntensityMultiplier = 1;

        if (currentTimeOfDay <= 0.23f || currentTimeOfDay >= 0.75f)
        {
            sunIntensityMultiplier = 0.2f;

            shaftIntensityMultiplier = 0f;
        }

        else if (currentTimeOfDay <= 0.25f)
        {
            sunIntensityMultiplier = Mathf.Clamp01((currentTimeOfDay - 0.25f) * (1 / 0.02f));

            shaftIntensityMultiplier = Mathf.Clamp01((currentTimeOfDay - 0.25f) * (1 / 0.02f));
        }

        else if (currentTimeOfDay >= 0.73f)
        {
            sunIntensityMultiplier = Mathf.Clamp01(1 - ((currentTimeOfDay - 0.73f) * (1 / 0.02f)));

            shaftIntensityMultiplier = Mathf.Clamp01(1 - ((currentTimeOfDay - 0.73f) * (1 / 0.02f)));
        }

        sun.intensity = sunInitialIntensity * sunIntensityMultiplier;

        sunShaft.sunShaftIntensity = sunShaftIntensity * shaftIntensityMultiplier;
    }
}